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Go Programming Language Pointers
Go Programming Language Pointers
In Go programming, pointers feature is available and explains here how to use pointers.
A pointer is a programming language object whose value refers to another value stored else-where in the memory using it’s address.
Address of memory for any value can be accessed using & symbol.
package main
import "fmt"
func main() {
var a int
a = 20
// prints value of a
fmt.Printf("Value of a: %d\n", a)
// prints address of x
fmt.Println("Address of a: ",&a)
}
Output:
$ go build pointers.go $ ./pointers Value of a: 20 Address of a: 0xc42000a310
How to define pointer variable in Go ?
Below code is used to define integer pointer variable:
var a *int
Setting value to the pointer variable
*a = 10
Setting memory address to the pointer variable
a = memory_address
Go Pointers Example
package main
import "fmt"
func main() {
var a int
a = 20
//define pointer variables ptr and val
var ptr *int
val := new(int)
ptr = new(int)
// setting value to the pointer variable
*ptr = a
fmt.Printf("Address of pointer variable 'ptr': %d\n", ptr)
fmt.Printf("Value of pointer variable 'ptr': %d\n", *ptr)
//seting address
val = &a
// setting address of val variable to pointer variable
fmt.Printf("Address of pointer variable 'val': %d\n", val)
fmt.Printf("Value of pointer variable 'val': %d\n", *val)
}
Output:
$ go build pointers.go $ ./pointers Address of pointer variable 'ptr': 842350961080 Value of pointer variable 'ptr': 20 Address of pointer variable 'val': 842350961032 Value of pointer variable 'val': 20« Previous Next »
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